Lubricated sliding wear mechanism of chromium-doped graphite-like carbon coating
Lubricated sliding wear mechanism of chromium-doped graphite-like carbon coating
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DOI：
10.1016/j.triboint.2014.04.007
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发表时间：
2014-09
影响因子：
6.2
通讯作者：
P. Mandal;A. Ehiasarian;P. Hovsepian
中科院分区：
文献类型：
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作者：
P. Mandal;A. Ehiasarian;P. Hovsepian
本研究的目的是讨论铬掺杂类石墨碳涂层的摩擦学行为，并提出了在干（在空气中）和边界润滑滑动条件下的磨损机制的基础上产生的磨损产物的相组成的磨损轨迹在销-盘实验。如预期的那样，由于添加润滑剂，摩擦系数从0.22降低到0.12。拉曼光谱分析表明，在干摩擦条件下，磨损机制为氧化磨损，而在润滑剂存在下，磨损机制为化学反应磨损。在润滑条件下，涂层与油发生摩擦化学反应生成CrCl_3是降低摩擦磨损系数的关键因素。CrCl 3具有类似石墨的层状结构，因此它起到固体润滑剂的作用。
The current research aims to discuss the tribological behaviour of Chromium-doped graphite-like carbon coatings and suggest a wear mechanism under both dry (in air) and boundary lubricated sliding condition based on phase composition of the wear product generated in wear track during pin-on-disc experiments. As expected, the friction coefficient reduces from 0.22 to 0.12 due to addition of lubricant. Raman analysis indicates that wear mechanism is oxidative in dry sliding condition whereas it is chemically reactive in the presence of lubricant. It is speculated that the key-factor of reduced friction and wear coefficient in lubricated condition is the formation of CrCl3due to tribochemical reaction between coating and oil. CrCl3has graphite-like layered structure; therefore it acts like solid lubricant.